cutting edge or technologies. he has been working on the safety device for high speed trains. so they asked him to make a small test train. in order to make an accurate product, he has those from seven factories that used to work with h him. >> translator: i was in charge of this axle and wheel. at first, i didn't know what to d do. >> he asked his engineers experienced in building and tech service to assemble the parts. >> translator: even if all the individual pieces have been made precisely, it's understanding all the pieces and putting them all together. >> it is completed in four months. the modern supersized is a fractional mill me timetemillim. the train is tested and railway experts are delight with the product. >> translator: it's difficult to weld so many parts with such precision. the fact they were able to do it so precisely amazed me. >> the stability and to prevent the trains from tippliing over once they go over the rails. summer is exploring other uses for his train and to serve them abroad. >> translator: i think the model trains are more popular overseas. if